Home / 12,428.18-18,635.85-3,661.98

Finding the Fourth Proportional to 12,428.18, 18,635.85 and 3,661.98

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Solution

The fourth proportional to 12,428.18, 18,635.85 and 3,661.98 is: 5,491.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.18 : 18,635.85 = 3,661.98 : x
  2. Step 2: Convert to fraction form
    12,428.18/18,635.85 = 3,661.98/x
  3. Step 3: Cross multiply
    12,428.18x = 18,635.85 × 3,661.98
  4. Step 4: Simplify right side
    12,428.18x = 68,244,109.98
  5. Step 5: Solve for x
    x = 68,244,109.98/12,428.18
  6. Step 6: Final answer
    x = 5,491.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.